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Forum to discuss Trane residential thermostatsenTue, 14 Aug 2018 21:15:30 GMTvBulletin60http://www.thermostatforums.com/images/SultanThemeVB4R/misc/rss.pngThermostatforums.com - Trane Thermostathttp://www.thermostatforums.com/
OOps I think I broke our Trane Central AC(sorted the G and common pins)http://www.thermostatforums.com/showthread.php?1533-OOps-I-think-I-broke-our-Trane-Central-AC(sorted-the-G-and-common-pins)&goto=newpost
Wed, 25 Jul 2018 21:00:59 GMTI was probing for voltages when I accidentally clipped an alligator clip to the G and touched a few other pins to see which one turned the fan on....I was probing for voltages when I accidentally clipped an alligator clip to the G and touched a few other pins to see which one turned the fan on. Its a trane baysta239A that goes to a large unit in the attic and a separate radiator outside. Its an old fashioned type mercury slider that is strange seeing this house sold for 1.1M a few years ago. We have another model that powers the 1st floor AC and works fine. I was poking around with an alligator clip because I though I could hard wire the fan from "auto " to on" as someone that lives here is old and messes with that switch because they don't know how to work it and have some problems with learning. So I touched "G" and one of the three common on the bottom (I can post a pic if that helps but its pretty basic). I thought these things were pretty robust. Did I cook a diode? Where does this box go into the attic? I'm trying to avoiding oing up there in july.

Last year the AC broke and we traced it to a faulty cap on the outside fan/radiator thing. I was a metal cap the size of a soup can. We ere having issues before I poked it with the aligator clip but it just came back on by it self.

EDIT I Figured out to post a pic. I connected from a the G pin to the "common"? pins in the bottom right. The AC was off when I was testing so I'm not sure when I broke it.
]]>Trane ThermostatNichole1989http://www.thermostatforums.com/showthread.php?1533-OOps-I-think-I-broke-our-Trane-Central-AC(sorted-the-G-and-common-pins)